Method of and means for stripping ingots.



'UNITED sTATns PATENT oFFicn. f

EMIL GATHMANN, OF N EW YORK,

N. Y., ASSIGNOR TO GATI-IMANN ENGINEERING COM- PANY, 0F NEW YORK, N. Y.,A CORPORATION OF MAINE.

1vrrxrnon or AND MEANS ron STRIPPING INGoTs'.

Specification ofetters Patent.

Application led April 27, 1911.` Serial-No. 623,681.

To all whom 'it 'may concern: y

Be it known that LAEMIL GATHMANN, a citizen of the United States,residing in the city, county, and Stateo-f NewYork, have inventedcertain new and useful Improvements in Methods'of and Means forStripping Ingots, of whichthe `following' is a.

No. 921,972 of May top and the practice has been' 1n4 such casesljeetionasble pipes vices which raise the position it occupiedto reversethe mold with its contained ingot,

c'. e., to turn the mold bottoml side up and then liftthe mold Thismethod of that when early vertically from the ingot: procedure has theobjection are produced owing to the fact that the liquid or unsolidiedmetal which remains at t-he top or larger end of the ingot before thethe reversal of rise toward the, upper or smaller end of the ingot andcause the formation of pipes inthe body `ofthe ingot. By my presentinvention I avoid this reversal of the ,mold

and thus prevent the formation 'of low deep' seated pipes. This Iaccomplish by providing the ingot at its upper or larger end with meansadapted t engage lifting' deingot out ofthe mold While the latterremains undisturbed in the while being teemed.` It 1s also a lcommonpractice in molds of this class to make 'the mold lin two sections, thatis to say, the mold is longitudinally divided and thel sections are lsecured together by bolts or the nlike and after the rringfot is' castthe bolts are removed and the mold sections Withdrawn. This'avoids thereversalof the mold but this onstruction is objectionable in some casess' being-relativelyexpensive and necessitating the expenditure ofconsiderable time and labor in separating and assembling the mold parts,while by my inventhe mold chamber is larger at the' stripping isattempted ob-` mold'is reversed, will after, the mold cause a cavity toy-vided with a boss a thereof,

scribed tion the mold may be made in one single casting without anydeformation of the body of the ingot and ingot. p v

In the accompanying drawings, Figure l shows a vertical central sectionthrough a mold with an ingot therein and provided with devices whichform in the top or crop endof the ingt means adapted to engage devicesfor lifting the ingot from the mold chamber. Fig2`shwsa vertical centralsection through the .upper portion of a mold and an ingot andillustrates how lifting devices may be applied to the larger end chamberwithout in any way disturbing theA a modification in which mold. Fig. 3shows a recess is formed in the centrgl portion of without any reversalof the PatentedOct. 1, 1912. d

of the" 'ingot to lift it verticallyfrom the mold the crop end of theingot which is adapted to i receive lifting devices. ',Fig. 43 is a viewsimilar to Fig. 3 but showing'in addition how lifting devices areapplied to the central recess of the ingot.

The meid is made 0f Suitable man with.

a mold chamber-largerat top than-at bottom and the lower portion A ismade relatively thick, while the upper Vportion or neck N is maderelatively thi-n in order that the lo'wer portion of the ingot may coolmore rapidly thanthe upper portion in the mannerA described in my`vpatent above mentioned and in other prior patents `granted to me. TheVbottom'of the mold may be proadapted to rest in the socket bof a stoolB.' f I prefer ,to teem the mold at` the top. The walls may be ribbedinthe manner described in my former patents, but my invention is notnecessarily limited to ribbed molds because'in some casesd by. properlyproportioning the thickness vof the mold Walls to promote heat,radiation and absorption in the lower portion of the mold and to-retardheatA radiation at the top piping may bei greatly reduced and confinedin my former patents.A

AIt'is Well understood that in casting v'ingotsthe upper end thereof isusually cut or" or cropped. Often this cropped end vconstitutes aconsiderableortiol of the ingot. By the inventions descri ed'in my priorp atents the piping is confined to small portion at the top of the tothe upper-end of the ingot as dea i relativelyl ingot so that

